Entity.h

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#ifndef HRK_ENTITY_H
#define HRK_ENTITY_H

namespace hrk
{
    class Entity
    {
    public:
        Entity(void) : last_id_(next_id())
        {
        }

        virtual ~Entity(void)
        {
        }

        long id(void) const
        {
            return last_id_;
        }

        virtual void update(void) = 0;

    private:
        long last_id_;

        long next_id(void)
        {
            static long last_id_ = 0;
            return ++last_id_;
        }
    };
}

#endif